Pump hammering after installing accumulator
I have a class B with a nearly new pump (Shurflo 4008, installed about 1 year ago). Even with the bypass, running the sink caused pump cycling to a degree though not as bad as it was with the old 3 ch...
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Shuflo 4008 bypass SHOULD start to open at 40psi
Bypass adjustment is screw in assembly down low and closer to inlet side
Pressure switch adjustment is screw in assembly with wires coming out
Increase set points.......turn set screw 'CLOCKWISE'
Decrease set points.......turn set screw 'Counter-Clockwise'
Bypass should start to open at 40psi....fully open at 65psi
Pump shutoff should be at 55psi
Caution:
Full by-pass pressure setting should be at least 10 psi higher than pump shut off pressure.
If full by-pass is reached before the shut-off setting, the pump will not shut off.
Bypass adjustment is screw in assembly down low and closer to inlet side
Pressure switch adjustment is screw in assembly with wires coming out
Increase set points.......turn set screw 'CLOCKWISE'
Decrease set points.......turn set screw 'Counter-Clockwise'
Bypass should start to open at 40psi....fully open at 65psi
Pump shutoff should be at 55psi
Caution:
Full by-pass pressure setting should be at least 10 psi higher than pump shut off pressure.
If full by-pass is reached before the shut-off setting, the pump will not shut off.
